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<html><body>$a1=array("a"=>"red","b"=>"green","c"=>"blue");$a2=array("c"=>"yellow","d"=>"black","e"=>"brown");$a3=array("f"=>"green","c"=>"purple","g"=>"red");$result=array_intersect_key($a1,$a2,$a3);print_r($result);</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_array_intersect_key3 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:22:33 GMT --></html>